PROBLEM:   (QAR 49683,QAR 47674)         (Patch ID: OSF425-068)
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This patch fixes a problem in which a system may crash if multiple bad blocks
on a SCSI device are encountered simultaneously.

The stack trace is as follows:

   0 boot()
   1 panic()
   2 trap()
   3 _XentMM()
   4 cdisk_bbr_done()
   5 cdisk_bbr_write()
   6 cdisk_bbr_reassign_done()
   7 cdisk_bbr_work()
   8 cdisk_bbr_comp()
   9 as_finish()
  10 xpt_callback_thread()

PROBLEM:  (BCGM80NCB)    (Patch ID: OSF425-394)
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This patch fixes a problem in the cam driver.  A disk failure can cause the
driver to spend too much time retrying interleaved Test Unit Ready and
Start Unit commands.  As a result, the logging of the hard error caused
by the disk failure is delayed.

PROBLEM:  (QAR 64377)    (Patch ID: OSF425-442)
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This patch fixes the erroneous "SAR Stats" implementation of CAM statistics.
The original CAM stat's macros calculated inappropriate time deltas because
they were not measured on a per-io basis, and the times did not account for
overlapping i/o.

PROBLEM:  (CLD TKTR12275 CLD TKTR21726)    (Patch ID: OSF425-584)
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A typical stack trace is:
   5 panic  "ccmn_rem_ccb3: ccb not on any list") 
   6 ccmn_rem_ccb3  
   7 cdisk_complete 
   8 xpt_callback_thread